Sink faucet



FIG. 1 is a perspective view taken from the front and left side of a sink faucet showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The fragmentary broken line representation of a plumbing connection in FIG. 1 is for purposes of illustration only and forms no part of the claimed design. 

The ornamental design for a sink faucet, as shown and described. 